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Process Equipment and Plant Design

Process Equipment and Plant Design
In a thin cylindrical shell, the hoop stress is __________ stress.

Longitudinal
Radial
Compressive
Circumferential tensile

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Process Equipment and Plant Design
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally.

Higher
Lower
Same
Unpredictable

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

More than that for Tee (used as elbow, entering run)
Less than that for Tee (used as elbow, entering run)
Both B and C
Around 90

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Process Equipment and Plant Design
For annular flow of a fluid, the ratio of the equivalent diameter for pressure drop calculation to the equivalent diameter for heat transfer calculation is

D2/(d1 + d2)
(d1 + d2)/d2
D1/(d1 + d2)
(d1 + d2)/d1

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Process Equipment and Plant Design
In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is

> 10
30
> 20
< 10

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Process Equipment and Plant Design
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

D₂ - D₁
(D₂² - D₁²)/D₂²
None of these
(D₂² - D₁²)/D₁²

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